diff --git a/setup.py b/setup.py
index 4559eb81a6..b7c677c361 100644
--- a/setup.py
+++ b/setup.py
@@ -72,6 +72,7 @@
         'flask',  # interaction
         'requests',  # interaction
         'responses',  # interaction
+        'URLObject',  # interaction
         'pynng',  # parallel
         'sniffio', # parallel
         'redis',  # parallel